Apparatus for the drawing of tubular bodies of glass and the like



@ 27 1340 J. @ARQT 1,49 3? APPARATUS FOR THE DRAWING OF TUBULAR BODIESOF GLASS AND THE LIKE Filed May 18, 1951 HNVENTQ& 12 (MM Patented Feb.27, 1934 'rnn DRAWING or TUBU- F crass AND THE LIKE eaux sur Loing,France, asassignments, to Corning Glass N. Y., a corporation of NewAPPARATUS FOR LAR BODIES 0 Jean Gal-dot,

signer, by mesne Works, Corning, York- Application May 18, 1931, SerialNo. 538,355

In France May 21, 1930 x 8 Claims. (Cl. 49-111) The present inventionrelates to an arrangethrough into the interior of the bell, this commentfor the drawing of hollow bodies in the pressed air being intended tofacilitate in the shape of a tube or sleeve, of plastic material," knownmanner the drawing of the hollow bodies. more particularly of glass. Thebell-shaped organ 0 is supported by the in- This arrangement ischaracterized by the fact termediary of an arrangement, which allows tothat the plastic material flows out by gravity be given to the hell 2.position and an inclination through a member having a surface ofrevoluadjustable in every direction. The inclination of tion in theshape of a funnel, mounted in the the axis 11/ y of the bell crelatively to the axis sole of the drawing tank and completely sub- :2:a: of the member a can be modified by reason merged in the bath of fusedor molten material, of the knee-piece f. The bell 0 can be brought andby the fact that the delivery of this material closer to or be separatedfrom the organ a by is effected by a rotary organ in the shape of ascrewing or unscrewing a nut y along a screwbell which plunges into thebath of glass and threaded part c of the shaft e, which nut acts on capsor crowns the funnel and is adjustable as the ball of the knee-piece f.The horizontal to position and inclination in every direction, movementof the bell-shaped member 0 is obthis bell-shaped organ serving also toarrest imtained by causing the knee-piece f to slide on purities on thesurface of the bath of material. two parallel and horizontal bars h h,which at The annexed drawing represents, by way of their extremities canslide on two other parallel example, one form of constructing thearrangeand horizontal bars i z, perpendicular to the ment according tothe invention in its applioafirst two and connected to the framework ofthe tion to the horizontal drawing of tubular bodies machine. of glass.The drawn glass is bent thr Figure 1 is a view in axial vertical sectionof and drawn horizontally. For the arrangement. the parts being inexterior exit from the organ a, it is supported by a flexview. iblegutter k formed by V-shape'd elements, (flg- Figures 2 and 3 are viewsin side elevation and me 4) connected together by joints at k (flginplan of a detail, and Figure 4 is a section on ures 2 and 3) and forminga chain. The two line 44 of Figure 3. extremities of this chain can bedisplaced, paral- The bath of molten glass contained in the lei to thehorizontal drawing axis, at A: k in drawing tank flows by gravitythrough a memsuch a manner as to support or relieve more or her in theshape of a funnel a fixed or set in the less the dependent mass of glassalong the curve sole or base b of the tank b; this member, which whichis given to it. y is shaped to a surface of revolution around the Thethickness of the tubes obtained by the vertical axis a :0, ends at itsupper part in an aperdrawing operation is determined by the positionture a of which the cross section is contracted of the bell c relativelyto the organ a, by the towards the base and through which the glass tospeed of drawing, and by the pressure of the air be drawn will pass.This member a may be of admitted through the hollow shaft e supportingrefractory material, of metal non-oxidizable by the bell member. heat,or partly of refractory material and partly The adjustable position andinclination of the of metal. The upper part of this member a is bell crelatively to the organ a, enable the deat a slight distance below thelevel of the bath livery of glass to be regulated, enable this delivofglass in the tank. An organ 0, having the cry to be varied from onepoint to another in shape of a bell and supported at its upper part, thesection of drawing, and thus to regulate the plunges in the bath ofglass and caps or crowns thinning of the tube at the extrados. themember a, being held at a slight distance The bell e serves also to stopthe surface imfrom the upper part of the latter, in such a manpuritiesin the bath of glass and to homogenize ner as to determine, incombination with the latter, an annular gap d for the flow of glassintended to pass through the aperture a in the funnel-shaped member a.This bell-shaped orgen 0 is subjected to a movement of rotation aroundits axis 1;! i! by means of a pulley e fixed upon the shaft e carryingthe bell c. externally of the drawing tank. This shaft e is hollow sothat compressed air can be caused to arrive thereough a right angle thispurpose. at its the glass by its movement of rotation.

What I claim is:

1. An apparatus for the drawing of tubular bodies, of glass or any otherplastic material, comprising a drawing tank containing the molten glass,a gate member molmted in the bottom of said tank and completelysubmerged in the bath of glass, and a bell shaped member partiallyimmerged in the bath of glass, above and around no bodies, of glass orany other plastic material,

comprising a drawing tank containing the molten glass, a funnel shapedgate member mounted in' the bottom of said tank and completely submergedin the bath of glass, and a bell shaped member partiallylimmerged in thebath of glass, above and around the said gate member the pressure withinthe bell remaining constant.

3. An apparatus for the drawing of tubular bodies, of glass or any otherplastic material, comprising a drawing tank containing the molten glass,a gate member mounted in the bottom of said tank and completelysubmerged in the bath of glass, and a bell shaped member partiallyimmerged in the bath of glass, above and around the said gate member thepressure within the bell remaining constant, together with means foradjusting said beh shaped member as to position in height relatively tothe funnel.

4. An apparatus for drawing of tubular bodies, of glass or any otherplastic material, comprising a drawing tank containing the molten glass,a-

gate member mounted in the bottom of said tank and completely submergedin the bath of glass, and a bell shaped member partially immerged in thebath of glass, above and around the'said gate member the pressure withinthe bell remaining comprising a drawing tank containing the moltenglass, a gate member mounted in the bottom of said tank and completelysubmerged in the bath '01 glass. and a bell shaped member partiallyimmerged in the bath of glass, above and around the said gate member,together with means for angularly adjusting the bell shaped member inevery direction.

6. An apparatus for the drawing of tubular bodies, of glass or any otherplastic material, comprising a drawing tank containing the molten glass,a gate member mounted in the bottom of;

bodies, of glass or any other plastic material,

comprising a drawing tank containing the molten glass, a gate membermounted in the bottom 0! said tank and completely submerged in the bathof glass, and a bell shaped member partially immerged in the bath ofglass, above and around the said gate member, together with means forsupplying compressed air into said bell shaped member the pressurewithin the bell remaining constant. I 4

8. An apparatus for the drawing of tubular bodies, of glass or any otherplastic material. comprising a drawing tank containing the molten glass,a gate member mounted in the bottom of said tank and completelysubmerged in the bath of glass, and a bell shaped member partiallyimmerged in the bath of glass, above the said gate member, together witha gutter, adapted to support the drawn article at its exit from thefunnel shaped member, said gutter being formed of V shaped jointedelements, and means for giving a variable curve to said gutter.

JEAN CARDOT.

